Step aside, Grumpy Cat! Rey the "teeny tiny smiley" kitten is the new cool one in town.

This 5-month-old feline from Salt Lake City, Utah, is charming thousands of users on Instagram with her upturned eyes and mouth that make her look like she's "always smiling," according to her owners, Jenni Colborn and her husband Aaron Colborn.

"A lot of my friends, family, neighbors and coworkers are just obsessed with Rey and her smile," Jenni, 27, told ABC News today "We like to think she's the anti-Grumpy Cat, his self-proclaimed arch nemesis."

Aaron Colborn

Rey, a 5-month-old kitten from Salt Lake City, Utah, has been dubbed "Smiling Cat" because her upturned eyes and month make her look like she's always smiling.

Jenni said she adopted "teeny tiny smiley Rey" from an animal shelter near her workplace last November when she "stopped by after having a bad day." The shelter told Jenni that the kitten had been rescued as a stray found in an alleyway, she said.

The little cat "was just smiling at me and she crawled up to my lap, and I was like, 'Welp! I guess we're going to have a third cat now!" Jenni laughed. She added that she allowed Aaron, 37, to name the kitten to "keep him from being super mad I just brought home another cat."

Jenni said her smiling kitten is "super playful," loves cuddling and is quite "mischievous."

Aaron Colborn

Rey, a 5-month-old kitten from Salt Lake City, Utah, has been dubbed "Smiling Cat" because her upturned eyes and month make her look like she's always smiling.

"We made cookies one Sunday night, and I put it on the counter and wrapped in foil, but come Monday morning, she's sitting in the living room with like, 'Hey mom! Look I was I did! Look what I found!" Jenni said. "She's definitely the queen of our house."